Wood Roof Truss Span Tables

Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria.

Wood roof truss span tables.

Limited to span in inches divided by 360. 72 5 0 mi ni m u m girder floor truss floor truss jacks a a bearing wall girder floor truss floor truss jacks bearing wall cantilevered floor truss two 2x rim joists 24 max. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70.

Span calculator for wood joists and rafters also available for the android os. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Keep in mind that these tables are for estimations only.

Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. Span tables below illustrate common combinations of the multiple variables available. Roof floor truss manual 7 31 08 10 43 am page 12. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.

Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. Spacing of trusses are center to center in inches. Geometry loading spacing bearing conditions etc. Also available for the android os.

Floor truss span chart each individual floor truss design is unique based on multiple variables. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Maximum deflection is limited by l 360 or l 480 under live load. Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Deflection for 30 psf live load. Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration. And parallel to floor truss span strongback lateral supports 24 max.